Driving wheel assembly

Abstract

The invention provides a driving wheel assembly which comprises a driving wheel body and a plurality of driving tooth assemblies evenly arranged on the circumferential outer surface of the driving wheel body at intervals, each driving tooth assembly comprises a pin shaft and a roller arranged on the pin shaft in a sleeving mode, and the rollers are rotationally connected with the pin shafts; at least one annular oil storage groove is formed in the circumferential inner surface of the roller, the two ends of the pin shaft are fixed to the driving wheel body, and at least one of the two ends of the pin shaft is provided with an oil injection opening communicated with the oil storage groove. According to the driving wheel assembly, sliding friction at the meshing position of the track shoe and the driving wheel is changed into rolling friction through the shaft pins and the rotatable rollers, and therefore the service life of the driving wheel assembly and the service life of a track are prolonged. Meanwhile, due to the detachable structure of the driving tooth assembly, the driving tooth assembly can be rapidly replaced without disassembling the crawler chain, and therefore the maintenance cost of the driving wheel assembly is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to a driving wheel assembly which can be used to drive a crawler track. Background Art

[0002] The drive wheel is a key component of the traveling mechanism of crawler-type construction machinery. Its teeth mesh with the crawler track to transmit power and drive the entire machine to travel. Pin-type crawlers are widely used in large-tonnage excavators, cranes and other vehicles. Each track shoe has one or more shifting teeth that mesh with the drive wheel, and the crawler track is wound on the drive wheel. When the drive wheel and the crawler track enter and exit the meshing, there is relative sliding on the meshing surface, resulting in severe wear. The mismatch in pitch after wear will aggravate the wear and cause the drive teeth or crawler track to break. At present, most crawler-type construction machinery uses integrally cast or forged drive wheels. When they are worn to a certain extent, they need to be replaced with new drive wheels. The drive wheels are expensive and have a long maintenance and replacement cycle. Summary of the invention

[0003] In order to solve the technical problems existing in the prior art, the present application provides a driving wheel assembly, including a driving wheel body and a plurality of driving tooth assemblies evenly spaced along the circumferential outer surface of the driving wheel body, the driving tooth assembly including a pin shaft and a roller sleeved on the pin shaft, wherein the roller is rotatably connected to the pin shaft, the circumferential inner surface of the roller is provided with at least one annular oil storage groove, the two ends of the pin shaft are respectively fixed on the driving wheel body, and at least one of the two ends of the pin shaft is provided with an oil filling port connected to the oil storage groove.

[0004] Furthermore, at least two sleeves are provided between the roller and the pin shaft, the sleeves are distributed on both sides of the oil storage tank, the sleeves are connected with the inner hole of the roller by interference fit, and are connected with the pin shaft by clearance fit.

[0005] Furthermore, both ends of the inner hole of the roller are provided with oil seal grooves, and the oil seal grooves are provided with oil seals for preventing the lubricating medium inside the roller from leaking.

[0006] Furthermore, the oil filling port is connected with a screw plug.

[0007] Furthermore, the driving wheel body includes a connecting seat and a first spoke plate and a second spoke plate that are arranged at intervals. The connecting seat is integral with the first spoke plate and the second spoke plate. The first spoke plate and the second spoke plate are also connected with reinforcing ribs that are evenly spaced along their circumference. The reinforcing ribs are integral with the first spoke plate and the second spoke plate.

[0008] Furthermore, the first spoke plate and the second spoke plate are also provided with weight-reducing holes, and the weight-reducing holes are distributed between adjacent reinforcing ribs.

[0009] Furthermore, symmetrical pin holes are provided at the outer edges of the first spoke plate and the second spoke plate, the pin is inserted into the pin holes, a stop plate is provided outside the pin hole to limit the axial movement of the pin, and the stop plate is connected to the pin via a fastener.

[0010] Furthermore, the outer edges of the first spoke plate and the second spoke plate respectively extend toward the outside of the driving wheel body to form an annular protrusion, and the annular protrusion is provided with a positioning groove corresponding to the stop plate, and the stop plate is provided with a positioning protrusion that cooperates with the positioning groove to limit the rotation of the stop plate and the pin shaft relative to the driving wheel body.

[0011] Furthermore, a pin shaft hole is provided at the outer edge of the first spoke plate, a positioning groove coaxial with the pin shaft hole is provided on the inner side of the second spoke plate, a positioning column cooperating with the positioning groove is provided at one end of the pin shaft, the positioning column is engaged in the positioning groove to realize the circumferential fixed connection between the pin shaft and the driving wheel body, a stop plate is provided on the outer side of the pin shaft hole, and the stop plate is connected to the first spoke plate by a fastener to realize the axial fixed connection between the pin shaft and the driving wheel body.

[0012] Furthermore, the connecting seat is an internal spline shaft, and a thrust surface for limiting axial movement of the drive wheel assembly is provided on the outer side of the internal spline of the internal spline shaft, and a floating seal groove for installing a floating oil seal is provided on the outer side of the thrust surface.

[0013] Compared with the prior art, the beneficial effects of this application are: The driving wheel assembly of the present application is provided with a detachable driving tooth assembly, which includes an axle pin and a rotatable roller, and changes the sliding friction at the meshing point between the track plate and the driving wheel into rolling friction, thereby increasing the service life of the meshing pair; at the same time, the detachable structure of the driving tooth assembly reduces the maintenance cost; secondly, an oil storage tank is provided on the circumferential inner surface of the roller, and an oil filling port connected to the oil storage tank is provided at the end of the pin shaft, so that the worn parts of the driving wheel can be quickly oiled and maintained without removing the track chain, thereby reducing maintenance costs and improving work efficiency. Finally, the driving wheel assembly is connected to the reducer through a spline, which can better transmit power and withstand large torque, thereby providing better stability and higher transmission efficiency for the driving wheel assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the drive wheel assembly of the present application; Figure 2 A partial cross-sectional view of the drive wheel assembly of the present application; Figure 3 A front view of the drive wheel assembly of the present application; Figure 4 A cross-sectional view of a drive gear assembly of the present application; Figure 5 This is a schematic diagram of the structure of the driving gear assembly of the present application; Figure 6 A partial cross-sectional view of the connection socket of the present application; Figure 7 A side view of the drive wheel assembly of the present application; In the figure: 1. Driving wheel body; 11. First spoke plate; 12. Second spoke plate; 13. Connecting seat; 131. Thrust surface; 132. Floating seal groove; 133. Internal spline; 14. Reinforcing rib; 15. Lightening hole; 16. Pin hole; 17. Annular protrusion; 18. Positioning groove; 19. Tread; 2. Driving gear assembly; 21. Pin; 211. Oil filling port; 22. Roller; 221. Oil storage tank; 222. Oil seal groove; 23. Bushing; 24. Stop plate; 241. Positioning protrusion; 25. Oil seal; 26. Screw plug. DETAILED DESCRIPTION

[0015] In order to facilitate the understanding of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0016] The present application is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect defined in this way can be combined with any other aspect or aspects, unless it is clearly stated that it cannot be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0017] The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0018] In the description of the present application, it should be understood that the terms "inside", "outside", "up", "down", "left" and "right" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present application.

[0019] refer to Figures 1 to 3As shown, this embodiment discloses a driving wheel assembly, which is connected between the reducer and the crawler, meshes with the crawler to transmit power, and drives the whole machine to move. The driving wheel assembly includes a driving wheel body 1 and a plurality of driving tooth assemblies 2 evenly spaced along the circumferential outer surface of the driving wheel body 1, and the driving tooth assembly 2 is detachably connected to the driving wheel body 1. The driving tooth assembly 2 includes a pin 21 and a roller 22 sleeved on the pin 21, wherein the roller 22 is rotatably connected to the pin 21, and the circumferential inner surface of the roller 22 is provided with at least one annular oil storage groove 221, and the two ends of the pin 21 are respectively fixed on the driving wheel body 1, and at least one of the two ends of the pin 21 is provided with an oil filling port 211 connected to the oil storage groove 221.

[0020] In the prior art, when the drive wheel and the crawler track enter and exit the meshing, the meshing surfaces slide relative to each other, resulting in severe wear. After wear, the mismatched pitch will aggravate the wear and cause the drive teeth or crawler track to break. The drive wheel assembly of this embodiment changes the sliding friction at the meshing point between the crawler plate and the drive wheel into rolling friction through the shaft pin 21 and the rotatable roller 22, thereby increasing the service life of the drive wheel assembly and the crawler track. At the same time, the detachable structure of the drive tooth assembly 2 allows the drive tooth assembly 2 to be quickly replaced without disassembling the crawler chain, thereby reducing the maintenance cost of the drive wheel assembly.

[0021] In some embodiments, reference Figure 4 , Figure 5 As shown, the roller 22 has an annular oil storage groove 221 on its circumferential inner surface, and the annular oil storage groove 221 is located in the axial middle of the roller 22. The left end surface of the pin 21 has an oil filling port 211, which is connected to the annular oil storage groove 221 through an L-shaped oil hole inside the pin 21.

[0022] In the above embodiment, both ends of the inner hole of the roller 22 are provided with oil seal grooves 222, and the oil seal grooves 222 are provided with oil seals 25 for preventing the grease inside the roller 22 from leaking. Preferably, the oil seal 25 is a skeleton oil seal.

[0023] Furthermore, the oil filling port 211 on the end face of the pin shaft 21 is connected with a screw plug 26. When the lubricating grease is sealed in the annular oil storage groove 221 through the screw plug 26 and the oil seal 25, the rotation between the pin shaft 21 and the roller 22 can be lubricated in real time, thereby reducing the wear between the pin shaft 21 and the roller 22. During daily maintenance, it is only necessary to remove the screw plug 26 on the end face of the pin shaft 21 and inject the lubricating grease into the annular oil storage groove 221 of the roller 22 along the oil filling port 211, which greatly improves the work efficiency.

[0024] In some embodiments, at least two sleeves 23 are further provided between the roller 22 and the pin 21. Preferably, two sleeves 23 are provided between the roller 22 and the pin 21. The sleeves 23 are distributed on both sides of the oil storage tank 221. The sleeves 23 are connected with the inner hole of the roller 22 by interference fit and are connected with the pin 21 by clearance fit. The sleeves 23 further reduce the wear of the roller 22 and increase the service life of the roller 22.

[0025] In some embodiments, the outer circumferential surfaces of the pin shaft 21 and the roller 22 are hardened by a quenching process, thereby improving the wear resistance of the pin shaft 21 and the roller 22 .

[0026] In some embodiments, the driving wheel body 1 is integrally cast and includes a first spoke 11, a second spoke 12, and a connection seat 13 connected to the reducer, which are arranged at intervals; the first spoke 11 and the second spoke 12 are arranged in parallel and symmetrically, and a gap is provided between the first spoke 11 and the second spoke 12. The connection seat 13 is arranged at the center of the first spoke 11 and the second spoke 12, and the connection seat 13 is integral with the first spoke 11 and the second spoke 12. A plurality of reinforcing ribs 14 are also connected between the first spoke 11 and the second spoke 12 and are evenly spaced along the circumference thereof, and the reinforcing ribs 14 are integral with the first spoke 11 and the second spoke 12.

[0027] In some embodiments, the outer contour of the driving wheel body 1 is constructed to be smooth, and this structure will not cause adverse phenomena such as stress concentration during the casting process.

[0028] In some embodiments, the outer peripheral surfaces of the first spoke 11 and the second spoke 12 are provided with treads 19 evenly spaced, and the treads 19 are distributed between two adjacent drive gear assemblies 2. The treads 19 are machined to ensure the accuracy and flatness of their surfaces. At the same time, the hardness of the treads 19 is further improved by quenching and hardening the surface, so that the treads 19 have higher wear resistance and rigidity. In this embodiment, the treads 19 on the outer peripheral surface of the driving wheel body 1 are provided to increase the applicability of the shape of the driving wheel assembly and the shape of the track shoe. During operation, the treads 19 of the driving wheel assembly are in contact with the treads of the track shoe, which reduces the contact stress between the driving wheel assembly and the track shoe, reduces the wear of both, and thus increases the service life of the driving wheel assembly and the track shoe.

[0029] In some embodiments, reference Figures 1 to 3 As shown, the first spoke 11 and the second spoke 12 are also provided with a plurality of weight-reducing holes 15 evenly distributed along the circumference thereof, and the weight-reducing holes 15 are distributed between adjacent reinforcing ribs 14. This is used to reduce the weight of the structure and facilitate the removal of mud adhered to the driving wheel assembly during use.

[0030] The driving wheel body 1 of this embodiment has a small number of components and is very light in weight. The driving wheel body 1 adopts a smooth transition structure. The connecting seat 13 and the reinforcing ribs 14 serve to connect and strengthen the first spoke plate 11 and the second spoke plate 12, so that the driving wheel body 1 is lighter and has stronger fatigue resistance, which is beneficial to the reliability of the driving wheel assembly and improves the operating safety and stability of the entire vehicle.

[0031] In some embodiments, symmetrical pin holes 16 are provided at the outer edges of the first spoke 11 and the second spoke 12, and the pin holes 16 are evenly spaced along the circumference of the first spoke 11 and the second spoke 12. The pin 21 is inserted into the pin hole 16, and the pin 21 is connected with the pin hole 16 with clearance fit. A stop plate 24 is provided outside the pin hole 16 to limit the axial movement of the pin 21, and the stop plate 24 is connected to the pin 21 by bolts.

[0032] Furthermore, the outer edges of the first spoke 11 and the second spoke 12 extend outward to form an annular protrusion 17, and an arc-shaped positioning groove 18 is provided at the inner circle of the annular protrusion 17 corresponding to the stop plate 24, and a positioning protrusion 241 is provided on the stop plate 24 to cooperate with the positioning groove 18 to limit the rotation of the stop plate 24 and the pin 21 relative to the driving wheel body 1. When replacing the roller 22, it is only necessary to remove the bolts of the stop plate 24 at both ends of the pin 21, and pull the pin 21 out of the pin hole 16 of the first spoke 11 and the second spoke 12, and the roller 22 can be disassembled.

[0033] In some embodiments, reference Figure 4 , Figure 5 As shown, a pin hole 16 is provided at the outer edge of the first spoke 11, a positioning slot coaxial with the pin hole 16 is provided on the second spoke 12, and a positioning column matched with the positioning slot is provided at one end of the pin 21, wherein the cross-sectional area of ​​the positioning column is smaller than the cross-sectional area of ​​the pin 21. The positioning column is engaged in the positioning slot to achieve a circumferential fixed connection between the pin 21 and the driving wheel body 1, and a stop plate 24 is provided outside the pin hole 16, and the stop plate 24 is connected to the first spoke 11 by bolts to achieve an axial fixed connection between the pin 21 and the driving wheel body 1.

[0034] In the above embodiment, there are many options for the specific arrangement of the positioning slot of the second spoke 12 and the positioning column of the pin 21. For example, the positioning slot of the second spoke 12 can be a rectangular, semicircular or wedge-shaped through hole, and the positioning column of the pin 21 can be a corresponding flat key, semicircular key or wedge key. When replacing the roller 22, it is only necessary to remove the bolt of the stop plate 24 at one end of the pin 21, and pull the pin 21 out of the pin hole 16 of the first spoke 11 and the second spoke 12 to complete the removal of the roller 22.

[0035] In some embodiments, reference Figure 2 , Figure 6As shown, the connecting seat 13 is an internal spline shaft. Preferably, the internal spline 133 of the internal spline shaft is an involute spline, which is used to connect with the external spline shaft of the reducer. The drive wheel assembly and the reducer are fixed circumferentially to avoid relative rotation between the drive wheel assembly and the reducer. In the prior art, the drive wheel and the reducer are mostly connected by bolts, which cannot withstand a large output torque; while in the present application, the drive wheel assembly and the reducer are connected by splines, which have a high speed adaptability and good rigidity, can better transmit power and withstand a large torque, thereby providing better stability and higher transmission efficiency for the drive wheel assembly.

[0036] In some embodiments, a thrust surface 131 for limiting axial movement of the drive wheel assembly is provided on the outer side of the inner spline 133 of the inner spline shaft, and a floating seal groove 132 for installing a floating oil seal is provided on the outer side of the thrust surface 131.

[0037] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, which fall within the scope of the present application to be protected. The scope of protection claimed in the present application is defined by the attached claims and their equivalents.

Claims

1. A driving wheel assembly, characterized in that: The invention comprises a driving wheel body (1) and a plurality of driving tooth assemblies (2) evenly spaced along the circumferential outer surface of the driving wheel body (1), wherein the driving tooth assembly (2) comprises a pin shaft (21) and a roller (22) sleeved on the pin shaft (21), wherein the roller (22) is rotatably connected to the pin shaft (21), and the circumferential inner surface of the roller (22) is provided with at least one annular oil storage groove (221), and both ends of the pin shaft (21) are respectively fixed to the driving wheel body (1), and at least one of the two ends of the pin shaft (21) is provided with an oil filling port (211) connected to the oil storage groove (221).

2. The driving wheel assembly according to claim 1, characterized in that: At least two shaft sleeves (23) are provided between the roller (22) and the pin shaft (21). The shaft sleeves (23) are distributed on both sides of the oil storage groove (221). The shaft sleeves (23) are connected to the inner hole of the roller (22) by interference fit and are connected to the pin shaft (21) by clearance fit.

3. The driving wheel assembly according to claim 1, characterized in that: Oil seal grooves (222) are provided at both ends of the inner hole of the roller (22), and oil seals (25) are provided in the oil seal grooves (222) for preventing leakage of lubricating medium inside the roller (22).

4. The driving wheel assembly according to claim 1, characterized in that: The oil filling port (211) is connected to a screw plug (26).

5. The driving wheel assembly according to claim 1, characterized in that: The driving wheel body (1) comprises a connecting seat (13) and a first spoke plate (11) and a second spoke plate (12) arranged at intervals, the connecting seat (13) and the first spoke plate (11) and the second spoke plate (12) are all integral, and reinforcing ribs (14) are also connected between the first spoke plate (11) and the second spoke plate (12) and are evenly spaced along their circumferential direction, and the reinforcing ribs (14) and the first spoke plate (11) and the second spoke plate (12) are all integral.

6. The driving wheel assembly according to claim 5, characterized in that: The first spoke plate (11) and the second spoke plate (12) are also provided with weight-reducing holes (15), and the weight-reducing holes (15) are distributed between adjacent reinforcing ribs (14).

7. The driving wheel assembly according to claim 5, characterized in that: Symmetrical pin shaft holes (16) are provided at the outer edges of the first spoke plate (11) and the second spoke plate (12), the pin shaft (21) is inserted into the pin shaft hole (16), a stop plate (24) is provided outside the pin shaft hole (16) for limiting the axial movement of the pin shaft (21), and the stop plate (24) is connected to the pin shaft (21) via a fastener.

8. The driving wheel assembly according to claim 7, characterized in that: The outer edges of the first spoke plate (11) and the second spoke plate (12) respectively extend toward the outside of the driving wheel body (1) to form an annular protrusion (17); a positioning groove (18) is provided on the annular protrusion (17) corresponding to the stop plate (24); and a positioning protrusion (241) is provided on the stop plate (24) to cooperate with the positioning groove (18) so as to limit the rotation of the stop plate (24) and the pin shaft (21) relative to the driving wheel body (1).

9. The driving wheel assembly according to claim 5, characterized in that: A pin hole (16) is provided at the outer edge of the first spoke (11); a positioning slot coaxial with the pin hole (16) is provided on the inner side of the second spoke (12); a positioning column cooperating with the positioning slot is provided at one end of the pin (21); the positioning column is engaged in the positioning slot to achieve a circumferential fixed connection between the pin (21) and the driving wheel body (1); a stop plate (24) is provided on the outer side of the pin hole (16); the stop plate (24) is connected to the first spoke (11) by a fastener to achieve an axial fixed connection between the pin (21) and the driving wheel body (1).

10. The driving wheel assembly according to claim 5, characterized in that: The connecting seat (13) is an internal spline shaft, and a thrust surface (131) for limiting axial movement of the drive wheel assembly is provided on the outer side of the internal spline (133) of the internal spline shaft, and a floating seal groove (132) for installing a floating oil seal is provided on the outer side of the thrust surface (131).

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